Apparatus for producing wheels in divided metallic molds.



. c. GRUNWALD. APPARATUS FOR PRODUCING WHEELS IN DIVIDED METALLIC MOLDS.

APPLICATION FILED AUG. 24, 1908.

958,635. Patented May 17,1910.

. asgnms-snnm 1. a a a? l &\

J? g Q 12 c. GRUNWALD. APPARATUS FOR PRODUCING WHEELS IN DIVIDED METAIQLIG MOLDS.

APPLICATION FILED AUG. 24, 1908. 958,635. 7 Patented May 17, 1910.

3 8HEETB-SHBET 2.

G. GRUNWALD; APPARATUS FOR PRODUCING WHEELS IN DIVIDED METALLIC MOLDS.

' APPLICATION FILED AUG. 24, 1908. 958,635. Patented May 17, 1910.

f 3 SHEETS-SHEET 3.

CARL GnUnwALn, or BREDENEY, GERMANY.

APPARATUS FOR PRODUCING WHEELS IN DIVIDED METALLIC MOLDS;

Specification of Letters Patent.

Application filed August 24, 1908. Serial No. 450,124.

Patented May 17, 1910.

To all whom it may concern; p Be it known that I, CARL GRUNWALD', a

subject of the Emperor of Germany, residing at 159/1, Bredeney, Prussia, Germany, have invented" certain new and useful Improvements in Apparatus for Producing Wheels in Divided Metallic Molds, of which the following is a specification.

The present invention relates to a process of and apparatus for producing wheels, especially steel wheels, in divided metallic molds. Y

The object of the invention is to provide an apparatus and a process of this' type which makes it possible to remove the casting from the mold extremely rapidly and in a very simple manner so as to permit a. great number of castings to be produced in a short time by means of the same mold. This object is attained by moving some parts of the mold axially relatively to each other, directly after the casting operation, to cause complete exposure of the casting, excepting the surfaces which rest on a special part of the mold which serves as a hub support.

In the employment of divided molds for wheels," it is already known to withdraw axially from the casting, directly after the casting operation, the upper and'lower annular parts of the mold which are located between the rim and the hub of the wheel; however, in the known molds the withdrawal takes place only to the extent required for ermitting free shrinkage of the casting.

n the employment of these molds, the casting is not completely exposed, with exception of the sur aces resting on the hub support, as is the case in the present invention,

in which the casting is exposed to such an extent that it can be directlyremoved.

The accompanying drawings show, by way of example, three embodiments of the apparatus for carrying out the process according to the present invention.

Figure 1 is a side View, partly in section, of the .first embodiment, the mold being closed; Fig. 2 is a side view corresponding to Fig. 1 and showing the mold 'openecl Fig. 3 shows the second. embodiment in a viewcorrespondingto that shown in Fig. 1; Fig. 4 is a top View of the lower half of the mold of the second embodiment and of the support for the hub of the wheel to be.

' opened.

embodiment in views corresponding to those shown in Figs. 1 and 2. p Reference will first be had to. the embodiment shown in Figs. 1 and 2f In each of the embodiments herein shown,

the mold, which is preferably made from ca t iron, consists of the two halves A and B, a ring support C or D for the end of the hub of the wheel to be cast, and a core F. The ring C constitutes the surface that receives the metal forming thehub, and in- Figs. 1 and 2 also constitutes the support for the hub. It is separate from the core F and interchangeable. The halves A and B are formed in such a manner that, when the mold is closed, they lie against each other in the central plane of the wheel to be cast. The upper half A carries a centering ring a which, when the mold is closed, engages in a groove 22. provided in the lower half B.

The section 'A has an upwardly disposed.

annular collar whose central openin a" bears such relation to the remainder 0 the mold, (particularly the core F) that when the mold is closed, a pouring. opening is left through which the molten metal is poured.

In the form shown in Figs. land 2, the

lower half B is rovided with a central openmg I) on the e ges-of which the support C for the hub of the wheel rests when the opening and closing the mold. The upper half A is provided with ,arms a which serve the purpose of retaining the upper half on a frame E when the mold is Below the mold and co=axial therewith is provided 'a cylinder G in which a piston H is guided- Through the medium of a conduit (not shown), and a switching member, such as a three-way'cock, pressure medium can be introduced into or conducted out of the cylmder G to cause the 1 piston to ascend or descend. On the upper end of the piston H is secured a dish-shaped disk It on which the lower half of the mold rests. The piston H is provided with an axial bore in which a rod N is arranged 7L1 when the mold is closed. The rod is longer than the piston H so that, when the rod moves downwardly with the piston'H,

the rod hits the bottom of the cylinder Gr with the rod N and the lower half B resting on the disk 72. are then elevated by introduction of pressure medium into the 'cylinder G. )Vhen the lower half B has almost reached the upper half A, which rests on the frame E, the ring a passes into the groove 5 The introduction of pressure 'medium into thecylinder G, is continued until the upper half is lifted to a slight extentfrom the frame E. The mold is then ready for the casting operation (Fig. 1). Directly after the casting operation is completed the pressure medium is let out of the cylinder G which causes the piston H, and consequently also the mold with the casting J to descend. The upper half A is retained on the frame E by the arms (62 while the lower half B with the casting J continues to move downwardly until the rod N'hits the bottom of the cylinder G. Henceforth,'the downward movement is carried out only by the piston 'H with the disk h and the lowerhalf B resting on the disk, while the casting J is retained by the support C carried by the .rod N andin this manner the casting, with except-ion of the surface resting on the support O, is exposed (Fig. 2), so that the casting is freed from all the parts preventing shrinking. it is apparent from the drawing that the casting can then be directly removed in a lateral direction in a very simple manner, whereupon the mold, after being closed once more in the manner already described, can immediately be filled afresh. In the second embodiment (Figs. 8 to 5) the upper half A of the mold is suspended from a carrier K of the frame E by means of eyes a Clamps O serve for holding the two halves of the mold together; a socle M which is arranged below the mold serves. the purpose of arresting the support C ofthe hub of the wheel whenthe mold is opened. In this embodiment the support C is formed in such a manner that it surrounds a part of the hub and spokes of the cast wheel. To that end the support C 'is substantially dishshaped. Then the mold'is closed, the support rests with a projection loosely on the projecting edge 6 of a recess which is pro vided for the support in the lower half-B of the mold. The bottom of the support C is provided with a downwardly tapering support against the action of the liquid" steel.

In the operation of the embodiment shown in Figs. 3 and 5, the-open mold.(Fig. -5)

is closed by lifting the lower half B by hand. and when the edge 6 hits the projection c the support C is carried along. The clamps O are applied to secure the two halves of the mold together, Directly after the casting operation the clamps O removed'and the lower half B with the'support C and'the casting J are lowered by hand through the medium of beams or the like. As soon as the support C reaches the socle M the lower half B is permitted to drop to theground overthe support G and the socle M. The casting is then exposed, with exception of the surfaces lying against the support C and can be removed laterally after it has been elevated to such an extent that the .hub passes out of the support C The third embodiment illustrated .in Figs.

6 and 7 mainly differs from the second embodiment in the fact that a hydraulic lifting device is used for elevating and lowering,

the lower half of the mold. The lifting device consists of a cylinder P and a'piston R which is'guided in the cylinder. On the up per end of the pistonR is screweda ring 7' which is connected to a supporting ring 1 by means of arms 1 which are bent at a right angle. The lower half B rests on the ring r Furthermore, a socle consisting of a plurality of pillars M is provided and serves for arresting the support C when the mold is opened; To close the mold pressure is introduced into the cylinder P so that the lower half B with the support C and finally also the upper half Afare elevated to the position shown in Fig. 6. Directly after the casting operation the pressure medium is i let out of-the cylinder P so that the piston R with the mold and the casting descend.

The upper half A. is retained on the frame E'by the arms a while the lower half-with.

the support G and the casting J continue to move downwardly until the support C hits the pillars Mt. lower halfdescends with the piston, so that the casting, with exception of the surfaces lying against the support C becomes exposed.

To obtain a uniform cooling of the cast. ing it is advisable, in all/the embodiments,

to coat the inner wall of the lower half B and the wall of the Support O or C against which the casting lies, with a coating of a material which is a poor conductor of heat, such as chamotte. This coating pre- Henceforth, only the lVithout departing from the scope of the invention, the support C in the mold of the first embodiment might be connected with the rod N and the plate n might be done away with.

Having thus described the invention, the following is what is claimed as new therein and desired to be secured by Letters Patent:

1. An apparatus for casting wheels com- "prising two mold-halves having a plane of separation coinciding with the transverse plane of the rim of the wheel and separable a distance equal at least to the axial dimension of the wheel, one of said mold-halves being provided witha central opening which permits introduction of the molten metal into'the mold when closed, a hub support having a surface which serves as a rest for the under face of the wheel hub, a core detachably mounted on said hub support, and means for supporting the wheel through the medium of the hub support, in a position axially removable from each half of the mold when in separated position.

2. An apparatus for casting wheels comprising two mold-halves having a plane of separation coinciding with the transverse plane of the wheel rim, one of said mold-.

halves being provided with a central opening which-permits introduction of the molten metal, a hub support, having a surface which serves as a rest for the under face of the wheel hub, a core detachably mounted on said hub support, and projecting upwardly therefrom without closing the said pouring opening, and means for separating the mold-halves in the direction of the axis of the wheel, a distance sufficient to permit removal of the wheel in a direction transverse to its axis.

Anapparatus for casting metal wheels comprising two horizontal mold-halves, separable in a transverse plane of the rim of the wheel, a hub support, fitted to the under half of the mold, means supporting the mold at a height sufficient to permit separation of its members to release the casting, and means arresting the casting through the medium of the hub support, at a height intermediate of the mold-halves when the latter are separated.

4. An apparatus for casting wheels comprising two mold-halves having a plane of separation coinciding with the transverse plane of the wheel rim, a hub support, and means for separating the mold-halves in the direction of the axis of the wheel, adistance sufficient to permit removal of the wheel in a direction transverse to its axis; said separating means comprising independent supports for the hub supportand the mold half adjacent thereto, movable simultaneously to remove the casting from the opposite half of the mold, and then independently for the ing it from the moving half of the mold.

5. An apparatus forecasting wheels comprising two mold-halves ha ving a plane of separation coinciding with the transverse plane of the wheel rim, a hub support, and

'70 purpose of arresting the casting while releasmeans for separating the mold-halves. in the direction of the axis of the wheel, .a distance sufiicient to permit removal of the wheel in a direction transverse to its axis; said separating means comprising pistons for the hub support and the mold-half adjacent thereto, movable simultaneously to remove the casting from the oppositehalf of the mold, and then independent-1y for the purpose of arresting the casting while releasing it from the movinghalf of the mold.

6. An apparatus for casting wheels comprising two separable mold-halves, a support for-the hub of the wheel to be cast, a reciprocatory member supporting the lower half of the mold, means for arrest-ing the upper half of the mold when the lower half is low-- rocatory member having arms supportingthe lower half of the mold, a frame adapted to arrest the downward movement of the upper half of the mold when thelower half is lowered by the movement of said member, and a plurality of pillars arranged below the hub support and out of the path of. movement of said arms andadapted to arrest the movement of the hub support while permitting the reciprocatory member and the lower half of the mold to continue their downward movement.

The foregoing specification signed at Barmen, Germany, this 10th day of August, 1908.

CARL GRUNWALD. [1,. s.] In presence of WM. \VAsnINoToN BRUNSWICK, O'r'ro Komc. 

